// Returns numeric uid of user
static uid_t get_uid() {
  char* user;
  struct passwd* pw;
  uid_t uid;

  uid = 0;
  user = getenv("USER");
  setpwent();
  while ((pw = getpwent()) != NULL) {
    if (strcmp(pw->pw_name, user) == 0) {
      uid = pw->pw_uid;
      break;
    }
  }
  endpwent();
  return uid;
}